/**
 * Created by wxbing (wxbing000@163.com) on 2021/8/19.
 */
const a = 1;
if (a) {
    console.log('this is inner');
}

let x = 2;       // 合法
console.log(x)
{
    let x = 5;   // 不合法
    console.log(x)
}
console.log(x)
